levels of organization and microscopy

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Across
  1. 5. an aggregation of the organ systems that work together
  2. 8. consists of two or more atoms that are chemically bonded together
  3. 10. highly organized assemblies of several macromolecules
  4. 12. a group of distinct and similar cells that work together
Down
  1. 1. system consists of several different organs that work together
  2. 2. the smallest unit of matter
  3. 3. consists of the totality of the ecosystems of planet Earth
  4. 4. pertains to a collection of ecosystems
  5. 6. consists of all the population of different species of organisms living together
  6. 7. a group of organisms of the same species occupying a given area
  7. 9. consists of all the community of organisms that inhabit the same area
  8. 11. collection of organelles that are functioning together